Adelia

Everyday Dynamic
They'd be very sweet and domestic together. Most likely lots of casual, non-sexual touches as they do daily chores together.

Sexual Dynamic
They are both bottoms. Nathael would end up 'topping', but they are essentially on the same level.
While Nathael is into more kinky things than Adelia, he wouldn't try to overstep her boundaries, only occasionally suggesting they try/do something different.
They'd be the most gentle couple imaginable.
Basic vanilla stuff doesn't drain Nathael as much, so they'd be able to do some aftercare before he passes out. Mostly some sweet words, cuddles, and smooches. There would be more after sleepy times.

Their History
She first met Nathael (and Nicholas) after they'd escaped from their village and happened upon Shikoba's tailorshop.
For the first few days she mostly kept looking at them from the doorway and occasionally helping with treating their wounds.
She was around the same age as Nathael, and started befriending him, even if it was a bit slow at first because Nathael wasn't exactly in the best mental/emotional state.
They eventually became best friends, and remained as such even after the brother's left.
At some point they also gained crushes on eachother. Canonically the crushes ended up passing and they remained as friends, but if they'd acted on the crushes and had become a couple, they'd most likely have eventually gotten married and even had kids.

First time together
Very awkward and nervous times all around with both of them being not only bottoms but virgins as well. It's almost surprising either of them managed to cum, honestly.

Endeavors/Advancements
While their first time was awkward, they learned a lot and later couplings have been a lot better.
They are still quite nervous and shy, but are a lot more comfortable touching eachother now.
They have tried a few things, mainly light bondage and some toys, afterwards, but they usually just stick to pure vanilla.